Kelly Clarkson and Seal perform

Photo by Nick Laham/Getty Images

Recording artists Kelly Clarkson and Seal perform the National Anthem prior to the IZOD IndyCar Series Indianapolis 500 Mile Race at Indianapolis Motor Speedway on May 29, 2011 in Indianapolis, Indiana.

Recording artists Kelly Clarkson and Seal perform the National Anthem prior to the IZOD IndyCar Series Indianapolis 500 Mile Race at Indianapolis Motor Speedway on May 29, 2011 in Indianapolis, Indiana. (Photo by Nick Laham/Getty Images)

Recording artists Kelly Clarkson and Seal perform the National Anthem prior to the IZOD IndyCar Series Indianapolis 500 Mile Race at Indianapolis Motor Speedway on May 29, 2011 in Indianapolis, Indiana.